I use Crashplan to backup my computers. On my home network they back up to each other without problem, and also to a USB harddrive. Incoming backups from friends go to the USB harddrive without problem. I can backup to my brother in another city from one of my computers (XP home) without problem but not from my other computer (Windows 7). He can backup to me without problem from computers running XP as well as Windows 7. My firewalls (Zonealarm) have identical settings. Still, I only get "Waiting for connection" from Crashplan on my Windows 7 computer. Suggestions, anyone?